表里为奸

Explanation: Table: internal and external; evil: hypocritical cunning. Analogy with the collusion, fraud and other improper means to do bad things. 　　Usage: The main predicate; as the predicate attribute; containing derogatory 　　Source: Ming SHEN Fu "wild things were made by Wang Hu Valley seal series thing": "Hu Wang Valley, ancestor worshiping doctor, to the eunuch Li Hou Shouning GUANG Results table for the rape, in particular to thank the ancestral Shuqing wide cut."